High-precision copper probe, the result is more accurate, and the speed is faster Equipped with light it is mineral water, the light will be on, otherwise it will not be on Gently immerse the pen tip in the water sample and observe the indication Remember not to wet the main body of the pen Suitable for water such as energy water machines, functional water machines, ionized water machines, ultrafiltration water purifiers, RO water purifiers, alkaline or mineralized, energy cups,, to check whether it is qualified BIO energy detection pen, which can quickly discriminate pure water, mineral water, and energy water, Manufacturer: Tsophreniq